Process of producing new oils.



H. M. CHASE.

PROCESS OF PRODUCING NEW OILS. APPLICATION FILED APR.29. 1916.

1,185,58 I Patented May 30,1916.

mwyfla HAROLD M. CHASE, OF WILMINGTON, NORTH CAROLINA.

PROCESS OF PRODUCING NEW OILS.

Specification of Letters Patent.

Application filed April 29, 191.6. Serial No. 94,346.

To all whom it may concern Be it known that I, HAROLD M. CHASE, acitizen of the United States, residing at Wilmington, in the county ofNew Hanover, State of North Carolina, have invented certain new anduseful Improvements in Processes of Producing New Oils, of which thefollowing is a description, reference being had to the accompanyingdrawings, forming a part hereof.

My invention relates to the production from heavy oils and pitchproduced by the destructive distillation of resinous wood such as theso-called lightwood of the turpentine producing regions of a new anduseful oil having the characteristics of rosin oil.

In the destructive distillation of resinous wood such as the lightwoodabove referred to there is produced a very desirable amount of heavy oilcommonly known as creosote oil and finding its main use in woodpreservation at a comparatively low price per gallon.

It is the object of my present invention to produce, by the process ofthe invention, from this heavy oil or creosote oil, or the pitch whichremains after the creosote oil is distilled off, an oil having thegeneral characteristics and useful qualities of rosin oil and having avalue per gallon very much greater than that of the creosote oil orpitch from which it is produced.

With this object in view, my invention consists in the processhereinafter described and particularly pointed out in the claims.

Referring to the drawings: the figure is a diagrammatic view of anapparatus adapted to carry out the process of my present invention.

In the drawings, 1 represents a still or retort, which may be of anydesired shape or size and is arranged to be heated by a furnace 2, theproduct of combustion passing upward and out through smoke stack 3. Thecreosote oil or pitch to be treated is placed in this still or retortand subjected to the heat of the fire in the furnace 2. A pipe 3 leadsfrom the still or retort 1 to a worm or condenser 4, in which the Vaporsdriven off by heat are condensed.

5 indicates a steam generator heated by furnace 6 and provided with theusual pressure gage 7. From this steam generator a pipe 8 leads to asuperheater 9, and from the superheater a pipe 10 leads to the still 1,within which the pipe 10 is extended to the bottom of the still, whereit terminates in a perforated pipe 11. v

In carrying out my process the creosote 011 or pitch is subjected to dryheat in the still and atthe same time dry steam preferably superheatedis introduced through the pipe 10 and perforated pipe 11. Thisintroduction of steam prevents the burning or cracking of the oil orpitch. The first vapors pass off at about 98 to 100 degrees centigrade,and from that temperature up to about 128 degrees centigrade the productis a light fractional distillate of no special value. from about 130degrees centigrade to 200 degrees an oil is produced of an amber or darkcolor, more or less opaque 011 account of the presence of water, whichon subsequent treatment by heat or otherwise to drive off the water,leaves a clear trans parent oil, heavier than water, dark amber incolor, having the general characteristics and useful qualities of rosinoil without the bloom which is characteristic of rosin oil. If the heatis run up to from 200 to 250 degrees centigrade, an oil is producedsomewhat heavier and darker in color and at heat from 250 degrees up, astill heavier oil is produced and the final residue in the still is asmall quantity of very heavy pitch or carbon.

It should be understood that my process is applicable to any of theheavier oils or pitch produced by distillation of resinous wood. The oilproduced, if it carries any odor of creosote, may be redistilled andfreed from such odor.

Having thus described my invention, what I claim is:

1. The herein described process of producing an oil having thecharacteristics of rosin Patented May 30, 1916.

As the temperature is increased tooil from creosote'oil, pitch or otherfluid tillation of resinous Wood, Which consists in subjecting suchproduct to dry heat in a still or retort, introducing dry steam into thestill or retort, maintaining such product at a temperature not exceeding130 degrees centigrade to distil off light oil and subsequently raisingthe temperature to above 200 degrees HAROLD M. CHASE.

Gopien oi this patent may be obtained for five cents each, by addressingthe "Commissioner of Patenm.

Washington, D. G.

